I scream, you scream, we all scream by Egantx7

Question 1

While ice cream cones were likely on the menu in Europe in the 19th century, at least in the United States the credit for inventing the ice cream cone goes to a waffle maker who sold ice cream seller Albert Aboussie some rolled waffles after Aboussie ran out of paper cups. In what city did this happen, then hosting the World's Fair where the pair were working (the state that was hosting the World's Fair has the ice cream cone as its official state food)?

St. Louis, Missouri